How old are your plug wires?
How are your grounds?
Replace every spade connector you can touch in the engine compartment.
Sounds like something electrical.
I've got an '81 and all the wiring gets pretty brittle after 26 years
of heat and vibration. Actually my wife's '86 is worse because of all
the salt it's seen.

Roger

On May 27, 2007, at 5:34 PM, Greg Marshall wrote:

> Arg.
>
> I posted a while back about how my van was stuttering and jerking when
> decelerating.  I adjusted the timing and thought I'd solved the
> problem, but it's back again.  Today I got caught in a rainstorm, and
> the problem got way worse.  So much stuttering and power loss that it
> was hard to drive home.  Again, the problem was most prominent when
> decelerating,
>
> I'm getting pretty frustrated with the thing.
>
> The van is an aircooled california version.  Can anyone suggest where
> to start with with this?  The ignition system is mostly new, and the
> double relay is new.
>
> Any thoughts would be apprecaited.
>
> Cheers,
> Greg
> 1982 Westy
>